硬盘保护的一个简单实现，就是发送Idle Immediate命令给硬盘。实际上thinkpad和hp电脑都是通过这个命令，让磁盘磁头立即收回达到保护磁盘的目的-Hard drive protection, a simple implementation, that is to send Idle Immediate command to the hard disk. In fact thinkpad and hp computers through this command, so that a